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I'm a beginner to Linux, and Mint. Is the XFCE community edition just the main edition with the XFCE desktop env, or does it have other stuff?Also, can I just upgrade it over Felicia 6 Main (what I'm running now, full, NOT mint4win), or do I have to backup and reinstall all over again?And finally, does XFCE have more bugs? Does it have more options?

If you were to install xfce4 onto your existing Mint install (so you had the choice to load either DE), I doubt it would look much different from the CE edition, but it would be a lot 'heavier'. I don't know if you can upgrade from one to the other. As for bugs well I don't have any more but that will probably depend on your hardware and what you want to use it for. Does it have more options? - No it doesn't, they are about the same I would say, it is just that the ones in Xfce are a hell of a lot easier to find than in Gnome.